Fig. 3From: The influence of heat on phytolith morphology and implications for quantifying archaeological foxtail and common milletsChanges in phytolith morphology are observed for common millet samples heated at 500 ℃ for different durations of time (a, diagnostic phytolith, η-undulated type from the husk; b-d, phytolith with disappeared ornaments and melting margin). Scale bar = 20 µmBack to article page